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Intel's response to Sandy Bridge Voltage - Page 4

post #31 of 86
is OP serious? LOL

Quote:
mjones@live.com: Well, I belive you guys.... you're the one's that made it afterall.
post #32 of 86
Now i can, maybe, debate the subject a little.
Lets take an example say gpus... Mainly gf100 from nvidia. Now regardless of what is "safe" or not, ill stick to msi's afterburner software. Any gf1xx based card had a max 1.087v, skip the non-reference. Gf1xx is based on 40nm proc. Now gf11x, the gf1xx refresh, also manufactured using 40nm proc. Has a higher limit in afterburner.
My point is that when u "perfect" a manufacturing process, u can push it harder. Now clearly 1.52v is INSANE. But i think sb can handle little more voltage than its gulftown siblings, 32nm vs 32nm ofcourse. But hey i dont own a sb or an i7, so i say LIGHT THEM UP.
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post #33 of 86
All OP did was talk to a call center agent and asked them to read the datasheet. Nothing new here guys!
    
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post #34 of 86
Quote:
Originally Posted by MoBeeJ View Post
Now i can, maybe, debate the subject a little.
Lets take an example say gpus... Mainly gf100 from nvidia. Now regardless of what is "safe" or not, ill stick to msi's afterburner software. Any gf1xx based card had a max 1.087v, skip the non-reference. Gf1xx is based on 40nm proc. Now gf11x, the gf1xx refresh, also manufactured using 40nm proc. Has a higher limit in afterburner.
My point is that when u "perfect" a manufacturing process, u can push it harder. Now clearly 1.52v is INSANE. But i think sb can handle little more voltage than its gulftown siblings, 32nm vs 32nm ofcourse. But hey i dont own a sb or an i7, so i say LIGHT THEM UP.
Bios limits are to protect cores on stock coolers / after market(not water) coolers. For instance(personally I have not done this..) unlocking 1.212v on a 580 under water with good coverage on vram and vregs is more than likely safe 24/7(when gaming as the cores downclocks).

Thus I usually go up to 0.10v higher than intel's max on my CPUs under water and have not had a problem yet.

The on caveat as others have said as 22nm and lower sizes are released there will be a lot less flexibility for core voltage.
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post #35 of 86
1.52v does seem insane compared to the past generation 32nm chips, but its also insane that these SB chips EASILY hit 4.4-.4.6ghz. That wasnt possible with previous cpus. so its possible that things have changed, after all the overclock ceiling has been raised to 5.0ghz and beyond
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post #36 of 86
Wow...what's up with all the new posters bumping 4 month old threads?
GUYS Pay attention to the thread date before posting something something completely worthless!

It's always someone with less than 5 posts necrobumping something like this
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post #37 of 86
Well 1.52 was a contributor in the death of my 2500k, 1.52v for 2 weeks straight running a mild 100% load.
Vdimm was run a 1.62 during that same time period.

So your guess is as good as mine as to what actually killed it.

I'm currently priming my Costa Rica @ 5ghz with 1.45v, i'm 30 mins in.
I'm pretty sure I can get lower on the vcore.
Max temps so far have been 69,79,81 and 76°c
Vdimm is at 1.5 running 1600mhz 7-8-7-24 2t.
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post #38 of 86
I don't buy into the whole 1.52v thing, either. There's no way I'm going to exceed 1.38v on my 32nm chip. I think Intel is reluctant to admit what the actual max safe voltage is at this point, considering that Sandy Bridge is selling like hotcakes with enthusiasts -- who are convinced of 1.52v. Would burst alot of bubbles if they knew it were less than 1.52v. And Intel possibly losing some sells over it. Just seems like they're staying neutral on the topic, on purpose. Too much of a grey area.
Edited by Diabolical999 - 5/3/11 at 12:28am
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post #39 of 86
Quote:
Originally Posted by grunion View Post
Well 1.52 was a contributor in the death of my 2500k, 1.52v for 2 weeks straight running a mild 100% load.
Vdimm was run a 1.62 during that same time period.

So your guess is as good as mine as to what actually killed it.

I'm currently priming my Costa Rica @ 5ghz with 1.45v, i'm 30 mins in.
I'm pretty sure I can get lower on the vcore.
Max temps so far have been 69,79,81 and 76°c
Vdimm is at 1.5 running 1600mhz 7-8-7-24 2t.
Were you using water or subzero?
I think 1.5v+ was only designed to be long term on subzero, and 1.4-1.5v on water or chilled water (assuming 24/7). Obviously benches are different. But it should be understood that the higher the voltage, the much better the cooling should be.

Quote:
I don't buy into the whole 1.52v thing, either. There's no way I'm going to exceed 1.38v on my 32nm chip. I think Intel is reluctant to admit what the actual max safe voltage is at this point, considering that Sandy Bridge is selling like hotcakes with enthusiasts -- who are convinced of 1.52v. Would burst alot of bubbles if they knew it were less than 1.52v. And Intel possibly losing some sells over it. Just seems like they're staying neutral on the topic, on purpose. Too much of a grey area.
You do realize that "safe" voltage depends on the type of cooling. 1.5v should be safe long term as long as you can keep the chip under 40C. Someone awhile ago said <1.4v for stress tests or air, 1.4-1.45v for games, 1.45v+ for water, 1.5v for subzero.
Edited by Falkentyne - 5/3/11 at 12:35am
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post #40 of 86
Quote:
Originally Posted by Falkentyne View Post
Were you using water or subzero?
I think 1.5v+ was only designed to be long term on subzero, and 1.4-1.5v on water or chilled water (assuming 24/7). Obviously benches are different. But it should be understood that the higher the voltage, the much better the cooling should be.



You do realize that "safe" voltage depends on the type of cooling. 1.5v should be safe long term as long as you can keep the chip under 40C. Someone awhile ago said <1.4v for stress tests or air, 1.4-1.45v for games, 1.45v+ for water, 1.5v for subzero.

Air my man.


The hardest it was stressed was a few runs of IBT and prime, that's the only time temps approached90°c.

The rest of the time, load 70's was the max.
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